Scourer



c, T. HOWSON.

Patented Mar. 22, 1921.

v 5 SHEETS-SHEET l.

. my a I (iflyowson C. T. HOWSON.

SCOURER.

APPLICATION FILED JULY a. 1916 5 SHEETS-SHEET 2.

Ema;

C. T. HOWSON.

SCOURER.

APPLI-CATIQN FILED JULY 81191.6.

Patented Mar. 22, 1921.

5 SHEETSSHEET 3.

c. T. Howsow.

SCOURER.

APPLICATION FILED JULY 8,1916- Patelited Mar. 22; 1921.

5 SHEETS-SHEEI'5.

Suva/Mo t C. THO wsqn,

Gum/mu:

Wit/mam UNITED STATES PATENT oer-"ice.

CHARLES '1. KOWBON, OF OWENSZBOBO, KENTUCKY, ASS IGNOR TO THE ANGLO-AMERICAN KILL 00., OF OWENSBOBJO, A. CQBPORATIOH 0]! KEN- TUCKY.

scoum Owensboro, inthe county of Daviess and' State of Kentucky, haveinvented new and useful Improvements in Scourers, of which the followingis a specification. The present invention relates to scouring machines,and in its present embodiment 1s described as particularly adapted foruse 1n scourin cereals such as wheat and the like, althou In it is to beunderstood that it is not limite to this specific use, as it isadaptable to a variety of uses other than that disclosed, and it may beemployed, with slight mod1fications and chan es in adjustments, as awheat peeler, a de ranner, rice polisher, rye scourer and the like.

The invention has as its objects to provide a scourer in which the grainor other material'tobe treated is thoroughly scoured and completelyfreed from all foreign particles or impurities which are mixed w1th ortend to cling to the grain without abrading or otherwise injuring thestock; and to provide a machine in which all collections oraccumulations of dust or other foreign matter which might collect verminor various other forms of fungi, resulting in contamination of thestock, is prevented.

Further objects of this invention are, to

provide a simple and compact machine, which may be efiiciently operatedwith a minimum amount of power and which is almost noiseless in itsoperation.

In the drawings which accompany and form a part of the specification, Ihave illustrated one embodiment of my invention, and in said drawings:

Figure 1 is a side elevational view of the entire machine, one of theside doors being removed to disclose parts of the internal construction.Fig. 2 is a detail view of one end of the scouring case suction hood.Fig. 3 is a fra entary sectional view taken on line 3-3, ig. 1.

a Fig. 4= is an elevational view of one end of the device; and Fig. 5 isan elevational view of the other end of the device.

Fig. 6 is a vertical sectional view taken longitudinally through theentire device.

Fig. 7 is a sectional view taken on line Specification of LettersPatent. Patent d M 22 1921 Application filed July 8, 1916. Serial R0.108,183. i

numerals represent like parts in the several views, 10 designatesacasing which may be of any suitable construction, but in the presentinstance, the same is disclosed as consist-. ing of two compartments,one of which compartments contains the instrumentalities for scouringthe stock and separating the .impurities therefrom, and the othercompartment, designated by the numeral 11, serving as a suction casingfor a suction fan 12. The two compartments'of the machine-are placed incommunication with each other by means of a tube or box 13.

In the top of the compartment which houses the scouringinstrumentalities and preferably adjacent one end thereof is a feedox 14open at its bottom end and having an' opening in one of its walls,formed byterminatmg such wall short of the others, to

permit the grain to be fed from the box 14 onto areciprocating shoe 15.The shoe is'lo cated close to the bottomedge of the box 14 and toprevent grain from leaking through the space between the loweredge ofthe box and-the top surface'of the shoe, sheeps wool 16, or othersuitable packing is secured by tacks or other means to the lower edge ofthe j illustration only. Attached to an ing horizontally from the flapor gate 17 is a threaded rod on which is adjustably mounted a weight 21.By this arrangement,

the gate may be'raised or lowered. to admit.

more or less grain to theshoe as desired, or the weight 21 may beadjusted u nthe'rod to which it is connected, to vary t e pressure tevertically maybe employed that shown iii the drawings being b way ofextend- 7 moved. In the lower with which the gate bears against thegrain within the feed-box.

The shoe 15 is suspended from the top of the casing by resilient orflexible StIIPS 22 which permit a vibratory or reclprocating movement tobe imparted to the shoe by the mechanism hereinafter described. The shoehas a main or top screen 23 onto which the feed-box delivers when theshoe is vibrated. The mesh of this screen is such as to permit the grainto pass therethrough, while the coarser impurities such as sticks,straw, corn, and the like, roll or slide down the main screen to a spout24 which delivers to the outside of the casing. The grain or seeds fallonto a seed screen 25, which screen delivers'the seeds to a hopper 26,while the finer foreign particles, such as broken grain, small seeds,sand and the like, pass through the perforations of the screen onto thesolid bottom 27 of the shoe, which delivers them to a spout 28discharging to the ou side of the machine.

The grain delivered by the seed screen 25 to the hopper 26 passesthrough one end of a suction pipe 29 and falls into a hopper 30 whichdelivers to the scouring mechanism. The suction pipe 29 leads upwardlyand then curves downwardly, as shown in Fig. 8, to a short pipe 31 whichdelivers to a settling chamber 32. The settling chamber 32 is exactlysimilar in structure to the settling chamber 33 shown in Fig. 7 andcomprises a closed compartment having one side inclined downwardly andoutwardly toward the side of the casing. In the side of the casing 10 atthe lower endof the inclined wall of the settling chamber is a door 34by means of which the heavier particles which collect in the settlingchamber may be repart of the settling chamber are a pair of plates 35inclinedi downwardly and inwardly of the casing and one of these platespivotally carries at its lower end an auxiliary door 36 which isnormally maintained in closed position due to gravity, and by thisconstruction, a pocket is provided in the bottom of the settlingchamber, and the auxiliary door 36 prevents air from being drawn throughthe cracks about the outer door 34. Above the outer door is a slot oropening to admit air in to the settling chamber, and the slot has asliide 36 for closing the opening when desire The chamber 32 is,furthermore, provided with a depending partition or web 37 which forms acompartment 38 having an open bottom, the current of air through whichis controlled by a swinging plate or valve 39. The valve 39, as shown inFig. 7, is pivoted at one end and is operated by means of a push-rod 40extending outwardly through the side of the casin to permit ready mamp alon thereof. he chamber 32 is in communication, by means of a transverseconduit or pipe 41 with a suction box 42' carries off the chaff, dust,shrunken kernels,

and all foreign particles of matter lighter than the grain beingtreated, and these impurities are carried by the pipes 29 and 31 to thesettling chamber 32. The current of air entering the chamber 32 passesbeneath the partition 37, the heavier particles dropping into the bottomof the settling chamber from which they may be removed through the door34, and the lighter particles being carried into the compartment 33through the conduit 41 into the suction box 42 from which they are drawnby means of the fan 12 through the member 13 into suction casing 11, andthey are forced through the outlet of the suction chamber to suitablecollecting receptacle.

he grain in the hopper 30 is carried into a cylindrical scouring case 43which may be of any suitable type, and while I have shown it, in thepresent embodiment, as being of reticulated material, it may beconstructed of wire cloth, perforated steel, chilled slot cast iron,fiat sheet steel, or any other material depending upon the material tobe treated.

Extending centrally through the scouring case 43 is a beater shaft 44which is mounted in suitable bearings 45 in the end walls of the casing10. The ends of the shaft 44 extend outside of the casing and on one ofsaid ends is removably mounted a pulley 46 by means of which thebeater-shaft may be driven, any suitable source of energy beingconnected up to said pulley. It is, of course. obvious that the bearings45 may be of any approved construction, but, in the present instance, Ihave disclosed the same as being of the ball-bearing type, so as toreduce friction to a minimum, and these bearings are carried byremovable bearing-boxes 47 which are detachably secured in the end wallsof the casing 10, which openings are of slightly greater diameter-thanthe beater section of the shaft, so as to permit removal of the beaterendwise of the casing through one of said openings without in any waydisassembling the machine.

The end of the beater shaft 44 extending through the suction casing 11carries the fan 12, and that portion of the shaft which lies within thescouring case is provided with a plurality of beaters or fingers 48.Adjacent one end of the scouring case, the beater shaft has a pair ofspirally arranged flights or flanges 49 whlch are disposed obliquely toany the longitudinal axis of the-beater, andthese flights are adapted"toforce. the grain from Each-of the rings is connected to t e next orless air-tight joint about the shaft Mi-and succeeding ring small lugs51 which engage in notches or recesses in adjacent ri and by thisarrangement, angular relative displacement of the rings is prevented.-The heaters or fingers 48 are corrugated radially with respect to theaxis of the shaft 44, and each ofthe corrugations of the fingers aredivergent so that each corrugation succes. sively presents its rubbingsurface to the grain with increased pressure, it being understood thatthe heater-shaft is adapted to rotate in a direction to cause thenarrowedge of the heaters 48 to enter the stock being treated. Thecorrugations of the beaters 48 have rounded or smooth corners whichprevent the liability of the stock breaking and cause a general butcontinuous rubbing of the heaters against the stock, the stockagainstthe stock, and the stock against the scouring case, and thus agentle and nonabrasive scouring action results, which does not injure orcrush the stock, but evenly removes all foreign particles capable ofbeing removed from the wheat or grain.

' The scouring of the grain or wheat is accomplished in the interior ofthe case by the fingers scouring the wheat or grain against itself, thegrain being scoured continuously from the inner periphery of the case tothe beater-shaft in the center of the case. The scouring which is donebetween the ends of the heaters and the inner surface of the case isincidental to the scouring by the heater-fingers against the grain, andthe stock agamst the stock. To form ,a more to reduce friction where itextends thro h the end Walls of the com artinent of the casing 10, whichcontains t cheater, I provide leather washers 52 upon the shaft whichengage the inside surfaces of said walls. I

The scouring case 43 is surrounded by or housed in a suction hood 53,which, in the present instance, comprises a somewhat Q1011,

h gated flat casing split longitudinally. and

vertically into two parts as shown in Fig. 7. The upper portion of thesuction'hood is curved'transvers'ely and concentrically to the scouringcase 43, andjis set closely thereto,-while the lower end of the hooddepends for some distance beneath the lower edge of the securing case,thereby providing a narrow annular passage about the top and sides ofthe scouring case, and an unobstructed passage in the bottom of thehood. Along the top Qf'th hQQd 53, and run ing the-1 111 stock isdelivered b length thereof is a slot 54*, aiia the'suaion hood isincommunication withfthe suction chainherll, through-the connecting Pipe55,

and thus the fan 12' draws the? air to ther suction hood. ,B

and through the same drawin out all fuzz,

heeswing, dirt, and the like,=l1berated'fromthe grain by the action ofthe heaters 4 8. The end wall of the-suction hood opposite the pipe 55is providedwitha number of small openings 56 which allow air to enterthe hoodv and clean the corners of all scours ings, dirt, and the like.By ventilating the 1 scribed, the necessity of an extra set of spoutinnow generally used in the standard types 0 machines for drawing off theforeign particles, is obviated, and all collection or accumulation offoreign matterin the in terior of the suction-hood 53, which might tendto collect growths which would contaminate the stock being treated, iselimihood 53 and the casing 43 in the manner denated. The two parts ofthe hood 53 may i be secured together in any suitable manner,

but in the present embodiment, I have disclosed this means as comprisingpivoted latches 56'.

At the discharging end of the scouring case is a sleeve 57 into whichthe beater-see tion of the shaft extends and which, dis-r charges into adischarge chute 58. The sleeve 57, as shown inFig. 3, is open at oneside, which opening. is normally closed by.

a retarding valve 59. Theretardingvalve 59 comprises a plate fixed alongits upper end to a pivoted shaft 60 which at one end extends outwardlybeyond the side of the:

casing and upon this outwardly. extending end isfixed a horizontallyextending arm 61 carrying an adjustable. weight 62; i The, retarding thescouring case, and the pressure upon the wheat may be varied b wheat-isforced by the spirally arranged lights or feeders 49 uponthebeater shaftfrom the hopper 30 into the-scouring case i 43, where thewheat is suhjectedto the scour ing or rubbingaction of the web-shaped valve'69jserves as a l later for retaining the wheat or other stockbeingtreated under suitable pressure within adjusting the weight 62lengthwise of t e arm. 61. The

1-20 beatcrsor fingers 48. -The pressure with l which the valve59retains the stock in the scouring case, while beingscoured, deter minesthe degree of. scouring, a greater pressure allowing a harder rubbingaction by the scouring of the grain. The 'sameamount of the flights 49into the scouring case at al times, and the feeding of the stock iindependent of the pressure heaters, and, therefore, a more thorough v vto which -the stock being scoured is subjected, and thus the capacity ofthe machine may be worked to its limit, although the pressure with whichthe stock is retained in the case by the valve 59 may be varied. Thefeeders 49 control the amount of stock being fed into the scouring case,and this amount valve may be pipe section 64,

'wardly extending of stock is uniform, although the retarding adjustedto retain the stock under greater or less pressure within the case.

The discharge chute 58 forms a part of a suction pipe 63 which, as shownin Fig. 4, extends upwardly into thecasing and curves downwardly, so asto deliver into the short which discharges into the settling chamber 33.The settling chamber 33 which is described above, isin all respectssimilar to the settling chamber 32, and is connected to the suction-box44 by means of a transverse conduit 65. Y

'By the latter arrangement, the finer particles of dust and otherimpurities which may have escaped the suction action while passingthrough the scouring case are again subjected to a current of air whichenters thedischarge chute 58, passes through the pipes 63 and 64 intothe settling chamber 33,

where heavier particles drop into the bottom of the settling chamber andare withdrawn therefrom through a side-door in the casing. The lighterparticles are carried through the conduit 65 into the suction box 44 andfrom thence are drawn, by means of the fan 12, into the suction chamber11.

It will be noted that the grain or stock being treated is subjected tothree distinct currents of air, it being subjected to one current of airbefore passing into the scouring case, a second current of air while .inthe scouring case, and a third current of air after it passes from thescouring. case, and by so repeatedly subjecting the stock to differentcurrents of air all foreign particles are thoroughly removed, and thestock is delivered from the machine in a thorou hly secured and cleancondition. All air poc ets or closed corners, which would tend tocollectmaterial in which bacteria might thrive, are eliminated, and allof the dust is delivered to one central point.

The shoe 15 is vibrated or reciprocated from a vertical eccentric shaft66 which is mounted in suitable bearings carried by a bracket 67extending from the end wall of the casing. The lower end of the shaft 66carries a frictiondisk 68, the lower face of which is adapted to engageagainst the periphery of a friction disk 69 secured by a screw 70, orother means upon the outend of the beater shaft 4-4, but it is to beunderstood that the friction drive between the beater shaft 44 and theshaft 66 may be varied as desired. Upon the upper end of the shaft 66 isa fly-wheel tion disk 68 71, which absorbs vibrations due to thereciprocation of the shoe and tends to cause the shaft 66 to rotate witha uniform angular movement. The shoe 15 is connected by means of a strapor strip of suitable material 72 to the upper end of the eccentric shaft66, and the shaft 66 may be provided with a suitable shifting lever 73for with drawing the disk 68 from. engagement with the disk 69.

' When the beater shaft 44 is driven, the eccentric shaft 66 is rotatedand the shoe 15 is vibrated, and due to the movement of the main screen23, the wheat or grain is automatically fed from the feed box to thescouring case. The friction wheelor disk 69 may be adjustedlongitudinally of the shaft 44, so that it may engage the face of thefricat different distances from its center, and this arrangement allowsthe eecentric shaft to be driven at different speeds.

so as to regulate the number of vibrations of the shoe and thereb theamount of stock which is automatically fed from the feed- When the shoe15 is stano grain is fed from the feed-box and the transmissionmechanism between the shafts 44 and 66 is noiseless in operation, and itmay be easily adjusted to vary the speed of vibration of the shoe.

It is, of course, obvious that the number and size of the perforationsin the screens of the shoe 15 and the angle of inclination or pitch ofthese screens may be varied as desired, dependin upon the kind of stockbeing handled. t is preferable, however, to vary the speed or rate ofvibration of the shoe in accordance with the kind of stock beingtreated, and the degree or quality of the separations desired to beobtained.

he invention is susceptible of various modifications and changes whichwould be within the spirit of the invention, without departing from thescopeof the following claims.

Having thus described my invention, what claim as new and desire tosecure by Letters Patent is 1. In a machine of the class described, thecombination of a grain feeding mechanism, a scouring case to which thegrain passes from said feeding mechanism, a suction pipe in the path ofthe grain to remove impurities therefrom before passing to the scouringcase, grain scouring mechanism in said case, a suction hood surroundingsaid scourbox onto the shoe. tionary,

ing case and having a longitudinally-disa suction hood surrounscouringcaseto which the grain'passes from '---1sa id, feedin mechanism,a suction-pipe in]; the :patho the grain to i remove impuritiestherefrom before passing to the scouring case, grain scouring mechanismin said case,

sa1d scou "case and having :a'longitu ally-dispose.

. periphery of said scouringcase and longiair to direct a blast of-airagainst the tudi'nally, thereof, said suction "hood being providedwithadepending'bottom to receive impurities, afsuctlon pipe-connected to theconnected to bottom of saidlhood, a 'grain' deli'very pipe having agravityfdeliverydeg and an upwardly extend' suction leg to which saidscouring case dc 'vers and a suction pipe the suction leg of saiddelivery pipe. I v

3. In a machine of the class described," the combination of ain feedingmechanism, a reticulated scouring case to which the grain passes fromsaid feeding mechanism,'a suction pipe in the ath 'ofthe grain to removeimpurities there om before passing to the I hood, a grain delivery pipehaving a gravity leg and an u wardly extending suction leg to which saiscouring mechanism delivers,

45. scouringcase to which the gram passes from means for controllingthe-flow of grain from said scouring case tosaid' delivery pipe, and asuction pipe connected to the suctlon leg of said grain delivery pipe. i1 7 described, the

d; In 'amachine of the class combination of grain feeding mechanism, a

said feedingmechanism, a-suction pipe in the path of the grain-to removeimpurities therefrom before passing to v the securing case, a settlingchamber to which said suc-' tion pipe delivers to intercept and collecttheheavier particles in the suction pipe, an outlet pipe fromsaidsuction chamber, a

manual valve to controlsa'id outlet pipe,

" grain scouring mechanism in scouring :case, a suctionh'oodhavingjanalr-mlet to V deliver a radially-disposed blast of airlengthwise of'said scourinig'case, asuction pipe connected to saidsuction-hood opposite said air inlet, .a gram delivery plpe' hav ingagravity leg andanupwardly extend- Qing suction leg to which, sa1dscouring ca'se delivers, .a suction pipe connected to the suc t'io'n legof said gram delivery pipe, a settling trol said air outlet pipe.

5.='1In a. machineof theclass chamber to said last-named suction pipedelivers toj'v intercept and collect the heav erparticles, an 'airoutletpipe for said settling-chamber, and 'a'manual valve to concombinationofa suction casing having suct1on produclngmeans therein, gram feedingmchanism, a scouring case to which the grain passes-from said feedingmechanism,

a suctlon pipe idtheypath of the grain to remove'impurities therefrombefore passing to the scouring case leading to saidsuction caslng, grainscouring mechanism in said case, a suction hood the upper part of whichclosel surrounds said scouring case having a ra ially-disposed air inletdeliveringfia 1 blast of air longitudinally of said scouring described,the

case, a suction"-pipe connected ,to the lowerpart of said suction hoodand .leadingto said suction casing, a grain delivery pipe having agravity leg and a suction leg to which said scouring case delivers, anda sac tion pipe connected with the suction leg'ot sa1d gram dellveryplpeleading to said suction casing.

, 6. In a machine of the class described, the combination of a suctioncasing having suct1on producing means therein, grain feedingmechanlsm, ascouring case to which the gram passes from said feeding mechanism,

a suction pipe in the path of the grain to re move impurities therefrombefore passing Y to the scouring case leading to said suction casing, asettling chamber in said suction pipe between its intake and saidsuction cas ng, grain scouring mechanism in said case, a suction hood,the upper part of which closeliy surrounds said scouring case having ara ially-disposed air inlet delivering a blast of air longitudinally ofsaidscouring case, a suction pipe connected to the lower part of saidsuction hood, and leading to sa1d suction casmg, a grain delivery pipehaving a .gravity leg and a suction leg to which sa1d scouring,casedelivers, a'suction pipe connected with the suctionleg of said graindelivery pipe leading to said suction casing, and a settling chamber insaid suc- U011. pipe between the suction leg and said suction casing. av

'7; Ina machine of the class described, the combination with grainfeeding mechanism,

1 of a reticulated scouring case to which said mechanism delivers, grainscouring mechan sm 1n sa1d case, a suctlon hood, theupper part of whichsurrounds said scouring case closely adjacent thereto to form an annularspace about the same, said suction hood havin in its top a longitudinalldisposed air in ct slot to direct a radial .b ast of air' against saidscouring case andinto the annular space, said suction hood beingprovided with. a depending closed bottom to receive the impurities fromsaid scouring case, and a suction pipe connected to the bottom of saidsuction hood.

8. In a machine of the class described, the combination with grainfeeding mechanism, of a-reticulated scouring case to which saidmechanism delivers, grain scouring mechanism in said case, a tiallyoblate form having an enlarged upper portion closely surrounding saidscouring case and provided with a longitudinally-disposed. air inlet todeliver a radial blast of air against the periphery of said scouringcase, and a depending closed bottom portion to receive the impuritiesand a suction pipe connected to the bottom portion of said hood.

9. In a machine of the class described, the combination with grainfeeding mechanism, of a reticulated scouring case to which the grainpasses from said mechanism, a grain scouring mechanism in said case, asuction hood having an enlarged upper portion closely surrounding saidscouring case and provided with an air inlet lengthwise thereofto.discharge a radial blast of air against said scouring case, anda-narrowed and closed bottom portion adapted to receive impurities, asuction pipe connected with the bottom of said suction hood, a valveddelivery outlet from said scouring case, and a grain delivery pipe towhich said outlet pipe delivers having a depending gravity leg and anupwardly extending suction leg.

10. In a machine of the class described, the combination of a scouringand separating casing, a suction casing'independent of said scouringcasing and having suction producing instrumentalities therein, grainfeeding mechanismin said first-named casing, scouring mechanism to whichsaid feeding mechanism delivers, suction means con necting said scouringcasing and said suction casing and operative on the grain as it passesfrom the feeding mechanism to the scouring mechanism, suction meansoperative about and through the bottom and sides of said scouringmechanism and connecting said scouring casing andsaid suction casing, agrain delivery leg to which said scouring mechanism delivers the scouredand purified grain, and suction means operative on said delivery legconnecting with said suction casing.

11. In a machine of the class described, the combination of a scouringcasing, a suction casing independent thereof and connected therewith bya plurality of suction conduits, grain feeding mechanism in saidscouring casing, grain scouring mechanism in said scouring casing,suction producing means in said suction casing, operating means forgrain feeding mechanism exterior of said scouring casing, a single shafttraversing said casings upon which said suction hood of substansuctionproducing mechanism, said scouring mechanism and said operating meansfor said feeding mechanism are mounted, and hearings in the outer wallsof said scouring and suction casings for said shaft removably fitted tosaid walls and of a size to permit longitudinal withdrawal of said shaftand its scouring mechanism without disassembling them.

12. In a machine of the class described, a scouring case, a two-partsuction hood about said case and comprising a casing surrounding the topand sides of the case somewhat closely and depending at its bottombeneath said scouring case, said hood having a slot extending lengthwiseabove said scouring case, and means for drawing a current of air throughsaid slot and into and through said suction hood.

13. In a machine of the class described, a scouring case, a suction hoodabout said case and comprising a casing surrounding the top and sides ofthe case somewhat closely and depending at its bottom beneath saidsuction case, said hood having a slot extending lengthwise above saidscouring case, an outlet passage leading from one end of the hood andlocated beneath the scouring case, and means in said'outlet passage fordrawing a current of air through said slot and into and throu h saidsuction hood.

14. In a mac ine of the class described, a scouring case, a suction hoodabout said case and comprising a casing surrounding the top and sides ofthe case somewhat closely and depending at its bottom beneath saidscouring case, said hood having a slot extending lengthwise above saidscouring case and a plurality of openings in one of its ends, an outletpassage leading from the other end of said hood and located beneath saidscouring case, and means in said outlet assage for drawing air throughsaid slot and openings and into and through said suction hood.

15. A machine of the kind described comprising a housing, a scouringcasing horizontally arranged and supported in the housing in a centralportion of the latter and toward one end thereof, a suction chamber atthe other end of the housing, a suction element in said chamber, asieving mechanism supported in the housing and disposed directly abovethe scouring casing to deliver stock in one. end of the latter, saidscouring casing being adapted to discharge stock at the other endthereof, two air conduits, one of each extending from the suctionchamber to a point adjacent each end of the housing in order that acurrent of air will act upon the stock being fed and discharged from thescouring casing, and a suction hood surrounding the scouring casing andhaving connection with said suction chamber.

16. A machine of the kind described comprising a housing divided intotwo compartments by a substantially vertical partition, a scouringcasing horizontally arranged and supported in one of said compartmentsin a central portion thereof, a suction element in the other of saidcompartments, a sievin mechanism supported in the housing and disposeddirectly above the scouring casing to deliver stock in one end thereof,settling chambers arranged in the same compartment with the scouringchamber and at one side thereof, said settling chambers having a commonconnection with'said suction compartment, a conduit extending from eachof said settling chambers to apoint adjacent the ends of said scouringcasing, respectively, in order that a current of air will act upon thestock being fed and discharged from the scouring casing, and a suctionhood surrounding the scouring casing and having connection with thesuction compartment.

17. In a device of the kind described comprising a housing divided intotwo compartments by a substantially vertical partition, a scouringcasing horizontally arranged in one of said compartments in a centralportion of the latter, beater mechanism arranged in the scouring casingand having the shaft thereof extending through said housing, said outercompartment of the housing constituting a suction chamber,- a suctionelement in said suction chamber and mounted on said shaft, a sievingmechanism disposed in the compartment with the scouring casing anddirectly over the latter to deliver stock to one end thereof, saidscouring casing adapt ed to discharge stock at the other end thereof,settling chambers arranged within the compartment with said scouringchamber and at one side thereof, a common connection between saidsettling chambers and said suction chamber, a conduit extending fromeach of the settlingchambers, each of said conduits being extended topoints adjacent one end of the scouring casing, respectively, in orderthat a current of air will act upon the stock'being fed and dischargedfrom the casing, a suction hood surrounding the scouring casin andhaving connection with the suction c amber, and each of said settlingchambers having discharge openings.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses. 1

CHARLES T. HOlVSON.

